Validation of sea ice concentration - European sector
Bulletin date: 2025-11-20
Data source: OSI SAF N.H. multi-product sea ice concentration
Model vs. observations, sea ice class contingency tables
Date: 2025-11-14:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82895 |
5627 |
79 |
125 |
26 |
0 |
0 |
0 |
| OW |
49 |
221 |
109 |
174 |
106 |
7 |
0 |
0 |
| VODI |
0 |
17 |
53 |
267 |
118 |
24 |
0 |
0 |
| ODI |
0 |
0 |
0 |
106 |
222 |
30 |
0 |
0 |
| CDI |
0 |
0 |
0 |
16 |
374 |
537 |
29 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
3 |
1516 |
7524 |
162 |
|
...date precedes bulletin
|
Date: 2025-11-16:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82628 |
5431 |
105 |
209 |
18 |
0 |
0 |
0 |
| OW |
108 |
326 |
123 |
150 |
64 |
34 |
0 |
0 |
| VODI |
9 |
25 |
72 |
323 |
105 |
16 |
0 |
0 |
| ODI |
0 |
0 |
8 |
220 |
137 |
32 |
0 |
0 |
| CDI |
0 |
0 |
0 |
107 |
536 |
263 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
75 |
3146 |
6083 |
63 |
|
...date precedes bulletin
|
Date: 2025-11-18:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82370 |
5664 |
125 |
197 |
41 |
2 |
0 |
0 |
| OW |
43 |
353 |
145 |
158 |
37 |
5 |
0 |
0 |
| VODI |
0 |
47 |
58 |
312 |
94 |
45 |
0 |
0 |
| ODI |
0 |
1 |
6 |
231 |
198 |
39 |
0 |
0 |
| CDI |
0 |
0 |
0 |
29 |
461 |
362 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
4 |
14 |
2680 |
6274 |
421 |
|
...date precedes bulletin
|
Date: 2025-11-20:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
81958 |
5910 |
74 |
229 |
14 |
0 |
0 |
0 |
| OW |
69 |
310 |
98 |
233 |
38 |
0 |
0 |
0 |
| VODI |
3 |
71 |
78 |
262 |
139 |
10 |
0 |
0 |
| ODI |
0 |
0 |
5 |
182 |
284 |
5 |
0 |
0 |
| CDI |
0 |
0 |
0 |
67 |
515 |
366 |
1 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
62 |
1801 |
6961 |
671 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
81963 |
5868 |
86 |
233 |
15 |
0 |
0 |
0 |
| OW |
61 |
333 |
79 |
230 |
38 |
0 |
0 |
0 |
| VODI |
6 |
90 |
71 |
262 |
119 |
10 |
0 |
0 |
| ODI |
0 |
0 |
19 |
166 |
316 |
9 |
0 |
0 |
| CDI |
0 |
0 |
0 |
82 |
502 |
374 |
5 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
62 |
1789 |
6957 |
671 |
|
Date: 2025-11-22:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82031 |
5973 |
73 |
60 |
8 |
0 |
0 |
0 |
| OW |
72 |
293 |
135 |
192 |
41 |
0 |
0 |
0 |
| VODI |
1 |
87 |
75 |
299 |
70 |
8 |
0 |
0 |
| ODI |
0 |
0 |
4 |
188 |
189 |
46 |
0 |
0 |
| CDI |
0 |
0 |
0 |
65 |
490 |
391 |
55 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
49 |
1044 |
6539 |
1938 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
82042 |
5919 |
109 |
73 |
14 |
0 |
0 |
0 |
| OW |
60 |
343 |
93 |
211 |
32 |
0 |
0 |
0 |
| VODI |
2 |
90 |
69 |
266 |
63 |
8 |
0 |
0 |
| ODI |
0 |
1 |
16 |
166 |
205 |
45 |
0 |
0 |
| CDI |
0 |
0 |
0 |
88 |
498 |
349 |
55 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
35 |
1087 |
6539 |
1938 |
|
Date: 2025-11-24:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
81407 |
6457 |
94 |
96 |
3 |
0 |
0 |
0 |
| OW |
38 |
396 |
180 |
218 |
33 |
4 |
0 |
0 |
| VODI |
0 |
56 |
36 |
337 |
71 |
8 |
0 |
0 |
| ODI |
0 |
0 |
9 |
159 |
156 |
6 |
0 |
0 |
| CDI |
0 |
0 |
0 |
46 |
509 |
258 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
0 |
45 |
2017 |
6263 |
1514 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
81352 |
6360 |
110 |
161 |
30 |
6 |
0 |
0 |
| OW |
77 |
411 |
75 |
180 |
46 |
6 |
0 |
0 |
| VODI |
16 |
114 |
104 |
222 |
85 |
10 |
0 |
0 |
| ODI |
0 |
22 |
20 |
152 |
158 |
18 |
0 |
0 |
| CDI |
0 |
2 |
10 |
121 |
401 |
333 |
3 |
0 |
| VCDI |
0 |
0 |
0 |
20 |
97 |
1920 |
6260 |
1514 |
|
Date: 2025-11-26:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
80802 |
6988 |
92 |
96 |
0 |
0 |
0 |
0 |
| OW |
0 |
422 |
143 |
260 |
53 |
0 |
0 |
0 |
| VODI |
0 |
87 |
66 |
285 |
109 |
7 |
0 |
0 |
| ODI |
0 |
5 |
13 |
174 |
118 |
4 |
0 |
0 |
| CDI |
0 |
0 |
0 |
119 |
479 |
299 |
0 |
0 |
| VCDI |
0 |
0 |
0 |
11 |
157 |
1859 |
6337 |
1431 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
80796 |
6789 |
126 |
119 |
13 |
0 |
0 |
0 |
| OW |
5 |
466 |
86 |
202 |
64 |
0 |
0 |
0 |
| VODI |
1 |
187 |
61 |
262 |
64 |
8 |
0 |
0 |
| ODI |
0 |
44 |
16 |
208 |
134 |
6 |
0 |
0 |
| CDI |
0 |
16 |
24 |
99 |
428 |
291 |
0 |
0 |
| VCDI |
0 |
0 |
1 |
55 |
213 |
1864 |
6337 |
1431 |
|
Date: 2025-11-28:
| Best estimate |
Forecast |
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
80019 |
7269 |
187 |
162 |
7 |
0 |
0 |
0 |
| OW |
40 |
394 |
109 |
352 |
88 |
17 |
0 |
0 |
| VODI |
9 |
141 |
72 |
285 |
139 |
50 |
0 |
0 |
| ODI |
0 |
27 |
29 |
163 |
169 |
18 |
0 |
0 |
| CDI |
0 |
9 |
40 |
117 |
415 |
302 |
0 |
0 |
| VCDI |
0 |
1 |
1 |
106 |
234 |
2160 |
5938 |
1347 |
|
|
observations |
|
Ice free |
Ice free
near MIZ |
OW |
VODI |
ODI |
CDI |
VCDI
near MIZ |
VCDI |
m
o
d
e
l |
Ice free |
79954 |
7067 |
209 |
257 |
13 |
4 |
0 |
0 |
| OW |
63 |
378 |
78 |
307 |
123 |
33 |
0 |
0 |
| VODI |
51 |
216 |
58 |
176 |
184 |
31 |
0 |
0 |
| ODI |
0 |
68 |
12 |
179 |
134 |
27 |
0 |
0 |
| CDI |
0 |
102 |
37 |
111 |
348 |
254 |
0 |
0 |
| VCDI |
0 |
10 |
44 |
155 |
250 |
2198 |
5938 |
1347 |
|
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